package com.welmo.andengine.utility.inappbilling;
/* Copyright (c) 2012 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import android.app.Activity;
import android.app.PendingIntent;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentSender.SendIntentException;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.RemoteException;
import android.text.TextUtils;
import android.util.Log;

import com.android.vending.billing.IInAppBillingService;
import com.welmo.andengine.utility.inappbilling.PurchasingManager.IAPurchasing;

import org.json.JSONException;

import java.util.ArrayList;
import java.util.List;


/**
* Provides convenience methods for in-app billing. You can create one instance of this
* class for your application and use it to process in-app billing operations.
* It provides synchronous (blocking) and asynchronous (non-blocking) methods for
* many common in-app billing operations, as well as automatic signature
* verification.
*
* After instantiating, you must perform setup in order to start using the object.
* To perform setup, call the {@link #startSetup} method and provide a listener;
* that listener will be notified when setup is complete, after which (and not before)
* you may call other methods.
*
* After setup is complete, you will typically want to request an inventory of owned
* items and subscriptions. See {@link #queryInventory}, {@link #queryInventoryAsync}
* and related methods.
*
* When you are done with this object, don't forget to call {@link #dispose}
* to ensure proper cleanup. This object holds a binding to the in-app billing
* service, which will leak unless you dispose of it correctly. If you created
* the object on an Activity's onCreate method, then the recommended
* place to dispose of it is the Activity's onDestroy method.
*
* A note about threading: When using this object from a background thread, you may
* call the blocking versions of methods; when using from a UI thread, call
* only the asynchronous versions and handle the results via callbacks.
* Also, notice that you can only call one asynchronous operation at a time;
* attempting to start a second asynchronous operation while the first one
* has not yet completed will result in an exception being thrown.
*
* @author Bruno Oliveira (Google)
*
*/
public class IabHelper {
   // Is debug logging enabled?
   boolean mDebugLog = false;
   String mDebugTag = "IabHelper";

   // Is setup done?
   boolean mSetupDone = false;

   // Has this object been disposed of? (If so, we should ignore callbacks, etc)
   boolean mDisposed = false;

   // Are subscriptions supported?
   boolean mSubscriptionsSupported = false;

   // Is an asynchronous operation in progress?
   // (only one at a time can be in progress)
   boolean mAsyncInProgress = false;

   // (for logging/debugging)
   // if mAsyncInProgress == true, what asynchronous operation is in progress?
   String mAsyncOperation = "";

   // Context we were passed during initialization
   Context mContext;

   // Connection to the service
   IInAppBillingService mService;
   ServiceConnection mServiceConn;

   // The request code used to launch purchase flow
   int mRequestCode;

   // The item type of the current purchase flow
   String mPurchasingItemType;

   // Public key for verifying signature, in base64 encoding
   String mSignatureBase64 = null;

   // Billing response codes
   public static final int BILLING_RESPONSE_RESULT_OK = 0;
   public static final int BILLING_RESPONSE_RESULT_USER_CANCELED = 1;
   public static final int BILLING_RESPONSE_RESULT_BILLING_UNAVAILABLE = 3;
   public static final int BILLING_RESPONSE_RESULT_ITEM_UNAVAILABLE = 4;
   public static final int BILLING_RESPONSE_RESULT_DEVELOPER_ERROR = 5;
   public static final int BILLING_RESPONSE_RESULT_ERROR = 6;
   public static final int BILLING_RESPONSE_RESULT_ITEM_ALREADY_OWNED = 7;
   public static final int BILLING_RESPONSE_RESULT_ITEM_NOT_OWNED = 8;

   // IAB Helper error codes
   public static final int IABHELPER_ERROR_BASE = -1000;
   public static final int IABHELPER_REMOTE_EXCEPTION = -1001;
   public static final int IABHELPER_BAD_RESPONSE = -1002;
   public static final int IABHELPER_VERIFICATION_FAILED = -1003;
   public static final int IABHELPER_SEND_INTENT_FAILED = -1004;
   public static final int IABHELPER_USER_CANCELLED = -1005;
   public static final int IABHELPER_UNKNOWN_PURCHASE_RESPONSE = -1006;
   public static final int IABHELPER_MISSING_TOKEN = -1007;
   public static final int IABHELPER_UNKNOWN_ERROR = -1008;
   public static final int IABHELPER_SUBSCRIPTIONS_NOT_AVAILABLE = -1009;
   public static final int IABHELPER_INVALID_CONSUMPTION = -1010;

   // Keys for the responses from InAppBillingService
   public static final String RESPONSE_CODE = "RESPONSE_CODE";
   public static final String RESPONSE_GET_SKU_DETAILS_LIST = "DETAILS_LIST";
   public static final String RESPONSE_BUY_INTENT = "BUY_INTENT";
   public static final String RESPONSE_INAPP_PURCHASE_DATA = "INAPP_PURCHASE_DATA";
   public static final String RESPONSE_INAPP_SIGNATURE = "INAPP_DATA_SIGNATURE";
   public static final String RESPONSE_INAPP_ITEM_LIST = "INAPP_PURCHASE_ITEM_LIST";
   public static final String RESPONSE_INAPP_PURCHASE_DATA_LIST = "INAPP_PURCHASE_DATA_LIST";
   public static final String RESPONSE_INAPP_SIGNATURE_LIST = "INAPP_DATA_SIGNATURE_LIST";
   public static final String INAPP_CONTINUATION_TOKEN = "INAPP_CONTINUATION_TOKEN";

   // Item types
   public static final String ITEM_TYPE_INAPP = "inapp";
   public static final String ITEM_TYPE_SUBS = "subs";

   // some fields on the getSkuDetails response bundle
   public static final String GET_SKU_DETAILS_ITEM_LIST = "ITEM_ID_LIST";
   public static final String GET_SKU_DETAILS_ITEM_TYPE_LIST = "ITEM_TYPE_LIST";
   

   /**
    * Creates an instance. After creation, it will not yet be ready to use. You must perform
    * setup by calling {@link #startSetup} and wait for setup to complete. This constructor does not
    * block and is safe to call from a UI thread.
    *
    * @param ctx Your application or Activity context. Needed to bind to the in-app billing service.
    * @param base64PublicKey Your application's public key, encoded in base64.
    *     This is used for verification of purchase signatures. You can find your app's base64-encoded
    *     public key in your application's page on Google Play Developer Console. Note that this
    *     is NOT your "developer public key".
    */
   public IabHelper(Context ctx, String base64PublicKey) {
       mContext = ctx.getApplicationContext();
       mSignatureBase64 = base64PublicKey;
       logDebug("IAB helper created.");
   }

   /**
    * Enables or disable debug logging through LogCat.
    */
   public void enableDebugLogging(boolean enable, String tag) {
       checkNotDisposed();
       mDebugLog = enable;
       mDebugTag = tag;
   }

   public void enableDebugLogging(boolean enable) {
       checkNotDisposed();
       mDebugLog = enable;
   }

   /**
    * Starts the setup process. This will start up the setup process asynchronously.
    * You will be notified through the listener when the setup process is complete.
    * This method is safe to call from a UI thread.
    *
    * @param listener The listener to notify when the setup process is complete.
    */
   public void startSetup(final IAPurchasing listener) {
       // If already set up, can't do it again.
       checkNotDisposed();
       if (mSetupDone) throw new IllegalStateException("IAB helper is already set up.");

       // Connection to IAB service
       logDebug("Starting in-app billing setup.");
       mServiceConn = new ServiceConnection() {
           @Override
           public void onServiceDisconnected(ComponentName name) {
               logDebug("Billing service disconnected.");
               mService = null;
           }

           @Override
           public void onServiceConnected(ComponentName name, IBinder service) {
               if (mDisposed) return;
               logDebug("Billing service connected.");
               mService = IInAppBillingService.Stub.asInterface(service);
               String packageName = mContext.getPackageName();
               try {
                   logDebug("Checking for in-app billing 3 support.");

                   // check for in-app billing v3 support
                   int response = mService.isBillingSupported(3, packageName, ITEM_TYPE_INAPP);
                   if (response != BILLING_RESPONSE_RESULT_OK) {
                       if (listener != null) listener.onIabSetupFinished(new IabResult(response,
                               "Error checking for billing v3 support."));

                       // if in-app purchases aren't supported, neither are subscriptions.
                       mSubscriptionsSupported = false;
                       return;
                   }
                   logDebug("In-app billing version 3 supported for " + packageName);

                   // check for v3 subscriptions support
                   response = mService.isBillingSupported(3, packageName, ITEM_TYPE_SUBS);
                   if (response == BILLING_RESPONSE_RESULT_OK) {
                       logDebug("Subscriptions AVAILABLE.");
                       mSubscriptionsSupported = true;
                   }
                   else {
                       logDebug("Subscriptions NOT AVAILABLE. Response: " + response);
                   }

                   mSetupDone = true;
               }
               catch (RemoteException e) {
                   if (listener != null) {
                       listener.onIabSetupFinished(new IabResult(IABHELPER_REMOTE_EXCEPTION,
                                                   "RemoteException while setting up in-app billing."));
                   }
                   e.printStackTrace();
                   return;
               }

               if (listener != null) {
                   listener.onIabSetupFinished(new IabResult(BILLING_RESPONSE_RESULT_OK, "Setup successful."));
               }
           }
       };

       Intent serviceIntent = new Intent("com.android.vending.billing.InAppBillingService.BIND");
       serviceIntent.setPackage("com.android.vending");
       if (!mContext.getPackageManager().queryIntentServices(serviceIntent, 0).isEmpty()) {
           // service available to handle that Intent
           mContext.bindService(serviceIntent, mServiceConn, Context.BIND_AUTO_CREATE);
       }
       else {
           // no service available to handle that Intent
           if (listener != null) {
               listener.onIabSetupFinished(
                       new IabResult(BILLING_RESPONSE_RESULT_BILLING_UNAVAILABLE,
                       "Billing service unavailable on device."));
           }
       }
   }

   /**
    * Dispose of object, releasing resources. It's very important to call this
    * method when you are done with this object. It will release any resources
    * used by it such as service connections. Naturally, once the object is
    * disposed of, it can't be used again.
    */
   public void dispose() {
       logDebug("Disposing.");
       mSetupDone = false;
       if (mServiceConn != null) {
           logDebug("Unbinding from service.");
           if (mContext != null) mContext.unbindService(mServiceConn);
       }
       mDisposed = true;
       mContext = null;
       mServiceConn = null;
       mService = null;
       mPurchaseListener = null;
   }

   private void checkNotDisposed() {
       if (mDisposed) throw new IllegalStateException("IabHelper was disposed of, so it cannot be used.");
   }

   /** Returns whether subscriptions are supported. */
   public boolean subscriptionsSupported() {
       checkNotDisposed();
       return mSubscriptionsSupported;
   }


 

   // The listener registered on launchPurchaseFlow, which we have to call back when
   // the purchase finishes
   IAPurchasing mPurchaseListener;

   public void launchPurchaseFlow(Activity act, String sku, int requestCode, IAPurchasing listener) {
       launchPurchaseFlow(act, sku, requestCode, listener, "");
   }

   public void launchPurchaseFlow(Activity act, String sku, int requestCode,
		   IAPurchasing listener, String extraData) {
       launchPurchaseFlow(act, sku, ITEM_TYPE_INAPP, requestCode, listener, extraData);
   }

   public void launchSubscriptionPurchaseFlow(Activity act, String sku, int requestCode,
		   IAPurchasing listener) {
       launchSubscriptionPurchaseFlow(act, sku, requestCode, listener, "");
   }

   public void launchSubscriptionPurchaseFlow(Activity act, String sku, int requestCode,
		   IAPurchasing listener, String extraData) {
       launchPurchaseFlow(act, sku, ITEM_TYPE_SUBS, requestCode, listener, extraData);
   }

   /**
    * Initiate the UI flow for an in-app purchase. Call this method to initiate an in-app purchase,
    * which will involve bringing up the Google Play screen. The calling activity will be paused while
    * the user interacts with Google Play, and the result will be delivered via the activity's
    * {@link android.app.Activity#onActivityResult} method, at which point you must call
    * this object's {@link #handleActivityResult} method to continue the purchase flow. This method
    * MUST be called from the UI thread of the Activity.
    *
    * @param act The calling activity.
    * @param sku The sku of the item to purchase.
    * @param itemType indicates if it's a product or a subscription (ITEM_TYPE_INAPP or ITEM_TYPE_SUBS)
    * @param requestCode A request code (to differentiate from other responses --
    *     as in {@link android.app.Activity#startActivityForResult}).
    * @param listener The listener to notify when the purchase process finishes
    * @param extraData Extra data (developer payload), which will be returned with the purchase data
    *     when the purchase completes. This extra data will be permanently bound to that purchase
    *     and will always be returned when the purchase is queried.
    */
   public void launchPurchaseFlow(Activity act, String sku, String itemType, int requestCode,
		   IAPurchasing listener, String extraData) {
       checkNotDisposed();
       checkSetupDone("launchPurchaseFlow");
       flagStartAsync("launchPurchaseFlow");
       IabResult result;

       if (itemType.equals(ITEM_TYPE_SUBS) && !mSubscriptionsSupported) {
           IabResult r = new IabResult(IABHELPER_SUBSCRIPTIONS_NOT_AVAILABLE,
                   "Subscriptions are not available.");
           flagEndAsync();
           if (listener != null) listener.onIabPurchaseFinished(r, null);
           return;
       }

       try {
           logDebug("Constructing buy intent for " + sku + ", item type: " + itemType);
           Bundle buyIntentBundle = mService.getBuyIntent(3, mContext.getPackageName(), sku, itemType, extraData);
           int response = getResponseCodeFromBundle(buyIntentBundle);
           if (response != BILLING_RESPONSE_RESULT_OK) {
               logError("Unable to buy item, Error response: " + getResponseDesc(response));
               flagEndAsync();
               result = new IabResult(response, "Unable to buy item");
               if (listener != null) listener.onIabPurchaseFinished(result, null);
               return;
           }

           PendingIntent pendingIntent = buyIntentBundle.getParcelable(RESPONSE_BUY_INTENT);
           logDebug("Launching buy intent for " + sku + ". Request code: " + requestCode);
           mRequestCode = requestCode;
           mPurchaseListener = listener;
           mPurchasingItemType = itemType;
           act.startIntentSenderForResult(pendingIntent.getIntentSender(),
                                          requestCode, new Intent(),
                                          Integer.valueOf(0), Integer.valueOf(0),
                                          Integer.valueOf(0));
       }
       catch (SendIntentException e) {
           logError("SendIntentException while launching purchase flow for sku " + sku);
           e.printStackTrace();
           flagEndAsync();

           result = new IabResult(IABHELPER_SEND_INTENT_FAILED, "Failed to send intent.");
           if (listener != null) listener.onIabPurchaseFinished(result, null);
       }
       catch (RemoteException e) {
           logError("RemoteException while launching purchase flow for sku " + sku);
           e.printStackTrace();
           flagEndAsync();

           result = new IabResult(IABHELPER_REMOTE_EXCEPTION, "Remote exception while starting purchase flow");
           if (listener != null) listener.onIabPurchaseFinished(result, null);
       }
   }

   /**
    * Handles an activity result that's part of the purchase flow in in-app billing. If you
    * are calling {@link #launchPurchaseFlow}, then you must call this method from your
    * Activity's {@link android.app.Activity@onActivityResult} method. This method
    * MUST be called from the UI thread of the Activity.
    *
    * @param requestCode The requestCode as you received it.
    * @param resultCode The resultCode as you received it.
    * @param data The data (Intent) as you received it.
    * @return Returns true if the result was related to a purchase flow and was handled;
    *     false if the result was not related to a purchase, in which case you should
    *     handle it normally.
    */
   public boolean handleActivityResult(int requestCode, int resultCode, Intent data) {
       IabResult result;
       if (requestCode != mRequestCode) return false;

       checkNotDisposed();
       checkSetupDone("handleActivityResult");

       // end of async purchase operation that started on launchPurchaseFlow
       flagEndAsync();

       if (data == null) {
           logError("Null data in IAB activity result.");
           result = new IabResult(IABHELPER_BAD_RESPONSE, "Null data in IAB result");
           if (mPurchaseListener != null) mPurchaseListener.onIabPurchaseFinished(result, null);
           return true;
       }

       int responseCode = getResponseCodeFromIntent(data);
       String purchaseData = data.getStringExtra(RESPONSE_INAPP_PURCHASE_DATA);
       String dataSignature = data.getStringExtra(RESPONSE_INAPP_SIGNATURE);

       if (resultCode == Activity.RESULT_OK && responseCode == BILLING_RESPONSE_RESULT_OK) {
           logDebug("Successful resultcode from purchase activity.");
           logDebug("Purchase data: " + purchaseData);
           logDebug("Data signature: " + dataSignature);
           logDebug("Extras: " + data.getExtras());
           logDebug("Expected item type: " + mPurchasingItemType);

           if (purchaseData == null || dataSignature == null) {
               logError("BUG: either purchaseData or dataSignature is null.");
               logDebug("Extras: " + data.getExtras().toString());
               result = new IabResult(IABHELPER_UNKNOWN_ERROR, "IAB returned null purchaseData or dataSignature");
               if (mPurchaseListener != null) mPurchaseListener.onIabPurchaseFinished(result, null);
               return true;
           }

           Purchase purchase = null;
           try {
               purchase = new Purchase(mPurchasingItemType, purchaseData, dataSignature);
               String sku = purchase.getSku();

               // Verify signature
               if (!Security.verifyPurchase(mSignatureBase64, purchaseData, dataSignature)) {
                   logError("Purchase signature verification FAILED for sku " + sku);
                   result = new IabResult(IABHELPER_VERIFICATION_FAILED, "Signature verification failed for sku " + sku);
                   if (mPurchaseListener != null) mPurchaseListener.onIabPurchaseFinished(result, purchase);
                   return true;
               }
               logDebug("Purchase signature successfully verified.");
           }
           catch (JSONException e) {
               logError("Failed to parse purchase data.");
               e.printStackTrace();
               result = new IabResult(IABHELPER_BAD_RESPONSE, "Failed to parse purchase data.");
               if (mPurchaseListener != null) mPurchaseListener.onIabPurchaseFinished(result, null);
               return true;
           }

           if (mPurchaseListener != null) {
               mPurchaseListener.onIabPurchaseFinished(new IabResult(BILLING_RESPONSE_RESULT_OK, "Success"), purchase);
           }
       }
       else if (resultCode == Activity.RESULT_OK) {
           // result code was OK, but in-app billing response was not OK.
           logDebug("Result code was OK but in-app billing response was not OK: " + getResponseDesc(responseCode));
           if (mPurchaseListener != null) {
               result = new IabResult(responseCode, "Problem purchashing item.");
               mPurchaseListener.onIabPurchaseFinished(result, null);
           }
       }
       else if (resultCode == Activity.RESULT_CANCELED) {
           logDebug("Purchase canceled - Response: " + getResponseDesc(responseCode));
           result = new IabResult(IABHELPER_USER_CANCELLED, "User canceled.");
           if (mPurchaseListener != null) mPurchaseListener.onIabPurchaseFinished(result, null);
       }
       else {
           logError("Purchase failed. Result code: " + Integer.toString(resultCode)
                   + ". Response: " + getResponseDesc(responseCode));
           result = new IabResult(IABHELPER_UNKNOWN_PURCHASE_RESPONSE, "Unknown purchase response.");
           if (mPurchaseListener != null) mPurchaseListener.onIabPurchaseFinished(result, null);
       }
       return true;
   }

   public Inventory queryInventory(boolean querySkuDetails, List<String> moreSkus) throws IabException {
       return queryInventory(querySkuDetails, moreSkus, null);
   }

   /**
    * Queries the inventory. This will query all owned items from the server, as well as
    * information on additional skus, if specified. This method may block or take long to execute.
    * Do not call from a UI thread. For that, use the non-blocking version {@link #refreshInventoryAsync}.
    *
    * @param querySkuDetails if true, SKU details (price, description, etc) will be queried as well
    *     as purchase information.
    * @param moreItemSkus additional PRODUCT skus to query information on, regardless of ownership.
    *     Ignored if null or if querySkuDetails is false.
    * @param moreSubsSkus additional SUBSCRIPTIONS skus to query information on, regardless of ownership.
    *     Ignored if null or if querySkuDetails is false.
    * @throws IabException if a problem occurs while refreshing the inventory.
    */
   public Inventory queryInventory(boolean querySkuDetails, List<String> moreItemSkus,
                                       List<String> moreSubsSkus) throws IabException {
       checkNotDisposed();
       checkSetupDone("queryInventory");
       try {
           Inventory inv = new Inventory();
           int r = queryPurchases(inv, ITEM_TYPE_INAPP);
           if (r != BILLING_RESPONSE_RESULT_OK) {
               throw new IabException(r, "Error refreshing inventory (querying owned items).");
           }

           if (querySkuDetails) {
               r = querySkuDetails(ITEM_TYPE_INAPP, inv, moreItemSkus);
               if (r != BILLING_RESPONSE_RESULT_OK) {
                   throw new IabException(r, "Error refreshing inventory (querying prices of items).");
               }
           }

           // if subscriptions are supported, then also query for subscriptions
           if (mSubscriptionsSupported) {
               r = queryPurchases(inv, ITEM_TYPE_SUBS);
               if (r != BILLING_RESPONSE_RESULT_OK) {
                   throw new IabException(r, "Error refreshing inventory (querying owned subscriptions).");
               }

               if (querySkuDetails) {
                   r = querySkuDetails(ITEM_TYPE_SUBS, inv, moreItemSkus);
                   if (r != BILLING_RESPONSE_RESULT_OK) {
                       throw new IabException(r, "Error refreshing inventory (querying prices of subscriptions).");
                   }
               }
           }

           return inv;
       }
       catch (RemoteException e) {
           throw new IabException(IABHELPER_REMOTE_EXCEPTION, "Remote exception while refreshing inventory.", e);
       }
       catch (JSONException e) {
           throw new IabException(IABHELPER_BAD_RESPONSE, "Error parsing JSON response while refreshing inventory.", e);
       }
   }

   /**
    * Listener that notifies when an inventory query operation completes.
    */
   


   /**
    * Asynchronous wrapper for inventory query. This will perform an inventory
    * query as described in {@link #queryInventory}, but will do so asynchronously
    * and call back the specified listener upon completion. This method is safe to
    * call from a UI thread.
    *
    * @param querySkuDetails as in {@link #queryInventory}
    * @param moreSkus as in {@link #queryInventory}
    * @param listener The listener to notify when the refresh operation completes.
    */
   public void queryInventoryAsync(final boolean querySkuDetails,
                              final List<String> moreSkus,
                              final IAPurchasing listener) {
       final Handler handler = new Handler();
       checkNotDisposed();
       checkSetupDone("queryInventory");
       flagStartAsync("refresh inventory");
       (new Thread(new Runnable() {
           public void run() {
               IabResult result = new IabResult(BILLING_RESPONSE_RESULT_OK, "Inventory refresh successful.");
               Inventory inv = null;
               try {
                   inv = queryInventory(querySkuDetails, moreSkus);
               }
               catch (IabException ex) {
                   result = ex.getResult();
               }

               flagEndAsync();

               final IabResult result_f = result;
               final Inventory inv_f = inv;
               if (!mDisposed && listener != null) {
                   handler.post(new Runnable() {
                       public void run() {
                           listener.onQueryInventoryFinished(result_f, inv_f);
                       }
                   });
               }
           }
       })).start();
   }

   public void queryInventoryAsync(IAPurchasing listener) {
       queryInventoryAsync(true, null, listener);
   }

   public void queryInventoryAsync(boolean querySkuDetails, IAPurchasing listener) {
       queryInventoryAsync(querySkuDetails, null, listener);
   }


   /**
    * Consumes a given in-app product. Consuming can only be done on an item
    * that's owned, and as a result of consumption, the user will no longer own it.
    * This method may block or take long to return. Do not call from the UI thread.
    * For that, see {@link #consumeAsync}.
    *
    * @param itemInfo The PurchaseInfo that represents the item to consume.
    * @throws IabException if there is a problem during consumption.
    */
   void consume(Purchase itemInfo) throws IabException {
       checkNotDisposed();
       checkSetupDone("consume");

       if (!itemInfo.mItemType.equals(ITEM_TYPE_INAPP)) {
           throw new IabException(IABHELPER_INVALID_CONSUMPTION,
                   "Items of type '" + itemInfo.mItemType + "' can't be consumed.");
       }

       try {
           String token = itemInfo.getToken();
           String sku = itemInfo.getSku();
           if (token == null || token.equals("")) {
              logError("Can't consume "+ sku + ". No token.");
              throw new IabException(IABHELPER_MISSING_TOKEN, "PurchaseInfo is missing token for sku: "
                  + sku + " " + itemInfo);
           }

           logDebug("Consuming sku: " + sku + ", token: " + token);
           int response = mService.consumePurchase(3, mContext.getPackageName(), token);
           if (response == BILLING_RESPONSE_RESULT_OK) {
              logDebug("Successfully consumed sku: " + sku);
           }
           else {
              logDebug("Error consuming consuming sku " + sku + ". " + getResponseDesc(response));
              throw new IabException(response, "Error consuming sku " + sku);
           }
       }
       catch (RemoteException e) {
           throw new IabException(IABHELPER_REMOTE_EXCEPTION, "Remote exception while consuming. PurchaseInfo: " + itemInfo, e);
       }
   }


   /**
    * Asynchronous wrapper to item consumption. Works like {@link #consume}, but
    * performs the consumption in the background and notifies completion through
    * the provided listener. This method is safe to call from a UI thread.
    *
    * @param purchase The purchase to be consumed.
    * @param listener The listener to notify when the consumption operation finishes.
    */
   public void consumeAsync(Purchase purchase, IAPurchasing listener) {
       checkNotDisposed();
       checkSetupDone("consume");
       List<Purchase> purchases = new ArrayList<Purchase>();
       purchases.add(purchase);
       consumeAsyncInternal(purchases, listener, null);
   }

   /**
    * Same as {@link consumeAsync}, but for multiple items at once.
    * @param purchases The list of PurchaseInfo objects representing the purchases to consume.
    * @param listener The listener to notify when the consumption operation finishes.
    */
   public void consumeAsync(List<Purchase> purchases, IAPurchasing listener) {
       checkNotDisposed();
       checkSetupDone("consume");
       consumeAsyncInternal(purchases, null, listener);
   }

   /**
    * Returns a human-readable description for the given response code.
    *
    * @param code The response code
    * @return A human-readable string explaining the result code.
    *     It also includes the result code numerically.
    */
   public static String getResponseDesc(int code) {
       String[] iab_msgs = ("0:OK/1:User Canceled/2:Unknown/" +
               "3:Billing Unavailable/4:Item unavailable/" +
               "5:Developer Error/6:Error/7:Item Already Owned/" +
               "8:Item not owned").split("/");
       String[] iabhelper_msgs = ("0:OK/-1001:Remote exception during initialization/" +
                                  "-1002:Bad response received/" +
                                  "-1003:Purchase signature verification failed/" +
                                  "-1004:Send intent failed/" +
                                  "-1005:User cancelled/" +
                                  "-1006:Unknown purchase response/" +
                                  "-1007:Missing token/" +
                                  "-1008:Unknown error/" +
                                  "-1009:Subscriptions not available/" +
                                  "-1010:Invalid consumption attempt").split("/");

       if (code <= IABHELPER_ERROR_BASE) {
           int index = IABHELPER_ERROR_BASE - code;
           if (index >= 0 && index < iabhelper_msgs.length) return iabhelper_msgs[index];
           else return String.valueOf(code) + ":Unknown IAB Helper Error";
       }
       else if (code < 0 || code >= iab_msgs.length)
           return String.valueOf(code) + ":Unknown";
       else
           return iab_msgs[code];
   }


   // Checks that setup was done; if not, throws an exception.
   void checkSetupDone(String operation) {
       if (!mSetupDone) {
           logError("Illegal state for operation (" + operation + "): IAB helper is not set up.");
           throw new IllegalStateException("IAB helper is not set up. Can't perform operation: " + operation);
       }
   }

   // Workaround to bug where sometimes response codes come as Long instead of Integer
   int getResponseCodeFromBundle(Bundle b) {
       Object o = b.get(RESPONSE_CODE);
       if (o == null) {
           logDebug("Bundle with null response code, assuming OK (known issue)");
           return BILLING_RESPONSE_RESULT_OK;
       }
       else if (o instanceof Integer) return ((Integer)o).intValue();
       else if (o instanceof Long) return (int)((Long)o).longValue();
       else {
           logError("Unexpected type for bundle response code.");
           logError(o.getClass().getName());
           throw new RuntimeException("Unexpected type for bundle response code: " + o.getClass().getName());
       }
   }

   // Workaround to bug where sometimes response codes come as Long instead of Integer
   int getResponseCodeFromIntent(Intent i) {
       Object o = i.getExtras().get(RESPONSE_CODE);
       if (o == null) {
           logError("Intent with no response code, assuming OK (known issue)");
           return BILLING_RESPONSE_RESULT_OK;
       }
       else if (o instanceof Integer) return ((Integer)o).intValue();
       else if (o instanceof Long) return (int)((Long)o).longValue();
       else {
           logError("Unexpected type for intent response code.");
           logError(o.getClass().getName());
           throw new RuntimeException("Unexpected type for intent response code: " + o.getClass().getName());
       }
   }

   void flagStartAsync(String operation) {
       if (mAsyncInProgress) throw new IllegalStateException("Can't start async operation (" +
               operation + ") because another async operation(" + mAsyncOperation + ") is in progress.");
       mAsyncOperation = operation;
       mAsyncInProgress = true;
       logDebug("Starting async operation: " + operation);
   }

   void flagEndAsync() {
       logDebug("Ending async operation: " + mAsyncOperation);
       mAsyncOperation = "";
       mAsyncInProgress = false;
   }


   int queryPurchases(Inventory inv, String itemType) throws JSONException, RemoteException {
       // Query purchases
       logDebug("Querying owned items, item type: " + itemType);
       logDebug("Package name: " + mContext.getPackageName());
       boolean verificationFailed = false;
       String continueToken = null;

       do {
           logDebug("Calling getPurchases with continuation token: " + continueToken);
           Bundle ownedItems = mService.getPurchases(3, mContext.getPackageName(),
                   itemType, continueToken);

           int response = getResponseCodeFromBundle(ownedItems);
           logDebug("Owned items response: " + String.valueOf(response));
           if (response != BILLING_RESPONSE_RESULT_OK) {
               logDebug("getPurchases() failed: " + getResponseDesc(response));
               return response;
           }
           if (!ownedItems.containsKey(RESPONSE_INAPP_ITEM_LIST)
                   || !ownedItems.containsKey(RESPONSE_INAPP_PURCHASE_DATA_LIST)
                   || !ownedItems.containsKey(RESPONSE_INAPP_SIGNATURE_LIST)) {
               logError("Bundle returned from getPurchases() doesn't contain required fields.");
               return IABHELPER_BAD_RESPONSE;
           }

           ArrayList<String> ownedSkus = ownedItems.getStringArrayList(
                       RESPONSE_INAPP_ITEM_LIST);
           ArrayList<String> purchaseDataList = ownedItems.getStringArrayList(
                       RESPONSE_INAPP_PURCHASE_DATA_LIST);
           ArrayList<String> signatureList = ownedItems.getStringArrayList(
                       RESPONSE_INAPP_SIGNATURE_LIST);

           for (int i = 0; i < purchaseDataList.size(); ++i) {
               String purchaseData = purchaseDataList.get(i);
               String signature = signatureList.get(i);
               String sku = ownedSkus.get(i);
               if (Security.verifyPurchase(mSignatureBase64, purchaseData, signature)) {
                   logDebug("Sku is owned: " + sku);
                   Purchase purchase = new Purchase(itemType, purchaseData, signature);

                   if (TextUtils.isEmpty(purchase.getToken())) {
                       logWarn("BUG: empty/null token!");
                       logDebug("Purchase data: " + purchaseData);
                   }

                   // Record ownership and token
                   inv.addPurchase(purchase);
               }
               else {
                   logWarn("Purchase signature verification **FAILED**. Not adding item.");
                   logDebug("   Purchase data: " + purchaseData);
                   logDebug("   Signature: " + signature);
                   verificationFailed = true;
               }
           }

           continueToken = ownedItems.getString(INAPP_CONTINUATION_TOKEN);
           logDebug("Continuation token: " + continueToken);
       } while (!TextUtils.isEmpty(continueToken));

       return verificationFailed ? IABHELPER_VERIFICATION_FAILED : BILLING_RESPONSE_RESULT_OK;
   }

   int querySkuDetails(String itemType, Inventory inv, List<String> moreSkus)
                               throws RemoteException, JSONException {
       logDebug("Querying SKU details.");
       ArrayList<String> skuList = new ArrayList<String>();
       skuList.addAll(inv.getAllOwnedSkus(itemType));
       if (moreSkus != null) {
           for (String sku : moreSkus) {
               if (!skuList.contains(sku)) {
                   skuList.add(sku);
               }
           }
       }

       if (skuList.size() == 0) {
           logDebug("queryPrices: nothing to do because there are no SKUs.");
           return BILLING_RESPONSE_RESULT_OK;
       }

       Bundle querySkus = new Bundle();
       querySkus.putStringArrayList(GET_SKU_DETAILS_ITEM_LIST, skuList);
       Bundle skuDetails = mService.getSkuDetails(3, mContext.getPackageName(),
               itemType, querySkus);

       if (!skuDetails.containsKey(RESPONSE_GET_SKU_DETAILS_LIST)) {
           int response = getResponseCodeFromBundle(skuDetails);
           if (response != BILLING_RESPONSE_RESULT_OK) {
               logDebug("getSkuDetails() failed: " + getResponseDesc(response));
               return response;
           }
           else {
               logError("getSkuDetails() returned a bundle with neither an error nor a detail list.");
               return IABHELPER_BAD_RESPONSE;
           }
       }

       ArrayList<String> responseList = skuDetails.getStringArrayList(
               RESPONSE_GET_SKU_DETAILS_LIST);

       for (String thisResponse : responseList) {
           SkuDetails d = new SkuDetails(itemType, thisResponse);
           logDebug("Got sku details: " + d);
           inv.addSkuDetails(d);
       }
       return BILLING_RESPONSE_RESULT_OK;
   }


	   void consumeAsyncInternal(final List<Purchase> purchases,
               final IAPurchasing singleListener,
               final IAPurchasing multiListener) {
       final Handler handler = new Handler();
       flagStartAsync("consume");
       (new Thread(new Runnable() {
           public void run() {
               final List<IabResult> results = new ArrayList<IabResult>();
               for (Purchase purchase : purchases) {
                   try {
                       consume(purchase);
                       results.add(new IabResult(BILLING_RESPONSE_RESULT_OK, "Successful consume of sku " + purchase.getSku()));
                   }
                   catch (IabException ex) {
                       results.add(ex.getResult());
                   }
               }

               flagEndAsync();
               if (!mDisposed && singleListener != null) {
                   handler.post(new Runnable() {
                       public void run() {
                    	   singleListener.onConsumeFinished(purchases.get(0), results.get(0));
                       }
                   });
               }
               if (!mDisposed && multiListener != null) {
                   handler.post(new Runnable() {
                       public void run() {
                    	   multiListener.onConsumeMultiFinished(purchases, results);
                       }
                   });
               }
           }
       })).start();
   }

   void logDebug(String msg) {
       if (mDebugLog) Log.d(mDebugTag, msg);
   }

   void logError(String msg) {
       Log.e(mDebugTag, "In-app billing error: " + msg);
   }

   void logWarn(String msg) {
       Log.w(mDebugTag, "In-app billing warning: " + msg);
   }
}
